1212131110 has 32 divisors (see below), whose sum is σ = 2313476640. Its totient is φ = 455680512.

The previous prime is 1212131083. The next prime is 1212131131. The reversal of 1212131110 is 111312121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123981 + ... + 133399.

It is an arithmetic number, because the mean of its divisors is an integer number (72296145).

Almost surely, 2^1212131110 is an apocalyptic number.

1212131110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212131110 is a deficient number, since it is larger than the sum of its proper divisors (1101345530).

1212131110 is a wasteful number, since it uses less digits than its factorization.

1212131110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1212131110 is about 34815.6733383113. The cubic root of 1212131110 is about 1066.2274664279.

Adding to 1212131110 its reverse (111312121), we get a palindrome (1323443231).

The spelling of 1212131110 in words is "one billion, two hundred twelve million, one hundred thirty-one thousand, one hundred ten".